Big changes, up to 3.8.5.5

tests/health_check.rs

@@ -1,4 +1,17 @@
 use std::net::TcpListener;
+use sqlx::{PgConnection, Connection};
+use mail_app::startup::run;
+use mail_app::configuration::get_configuration;
+
+fn spawn_app() -> String {
+    let listener = TcpListener::bind("127.0.0.1:0").expect("Failed to bind to random port.");
+    let port = listener.local_addr().unwrap().port();
+    let server = run(listener).expect("Failed to bind address");
+    // Launch in background
+    let _spawn = tokio::spawn(server);
+
+    format!("http://127.0.0.1:{}", port)
+}
 
 #[tokio::test]
 async fn health_check_works() {
@@ -18,13 +31,66 @@ async fn health_check_works() {
     assert_eq!(Some(0), response.content_length());
 }
 
-fn spawn_app() -> String {
-    let listener = TcpListener::bind("127.0.0.1:0")
-        .expect("Failed to bind to random port.");
-    let port = listener.local_addr().unwrap().port();
-    let server = mail_app::run(listener).expect("Failed to bind address");
-    // Launch in background
-    let _spawn = tokio::spawn(server);
+#[tokio::test]
+async fn subscribe_returns_a_200_for_valid_form_data() {
+    // Arrange
+    let app_address = spawn_app();
+    let configuration = get_configuration().expect("Failed to get config");
+    let connection_string = configuration.database.connection_string();
+    let mut connection = PgConnection::connect(&connection_string)
+        .await
+        .expect("Failed to connect to Postgres Database.");
+    let client = reqwest::Client::new();
 
-    format!("http://127.0.0.1:{}", port)
+    // Act
+    let body = "name=le%20guin&email=ursula_le_guin%40gmail.com";
+    let response = client
+        .post(&format!("{}/subscriptions", &app_address))
+        .header("Content-Type", "application/x-www-form-urlencoded")
+        .body(body)
+        .send()
+        .await
+        .expect("Failed to execute request.");
+
+    // Assert
+    assert_eq!(200, response.status().as_u16());
+
+    let saved = sqlx::query!("SELECT email, name FROM subscriptions",)
+        .fetch_one(&mut connection)
+        .await
+        .expect("Failed to fetch saved subscription.");
+    
+    assert_eq!(saved.email, "ursula_le_guin@gmail.com");
+    assert_eq!(saved.name, "le guin");
+}
+
+#[tokio::test]
+async fn subscribe_returns_a_400_when_data_is_missing() {
+    // Arrange
+    let app_address = spawn_app();
+    let client = reqwest::Client::new();
+    let test_cases = vec![
+        ("name=le%20guin", "missing email"),
+        ("email=ursula_le_guin%40gmail.com", "missing name"),
+        ("", "missing both name and email"),
+    ];
+
+    for (invalid_body, error_message) in test_cases {
+        // Act
+        let response = client
+            .post(&format!("{}/subscriptions", &app_address))
+            .header("Content-Type", "application/x-www-form-urlencoded")
+            .body(invalid_body)
+            .send()
+            .await
+            .expect("Failed to execute request.");
+
+        // Assert
+        assert_eq!(
+            400,
+            response.status().as_u16(),
+            "The API id not fail wth 400 Bad Request when the payload was {}.",
+            error_message
+        );
+    }
 }